feat: init web app.

src/App.tsx

@@ -0,0 +1,13 @@
+import { Routes, Route } from 'react-router-dom';
+import { Layout } from './components/Layout';
+import { HomePage } from './pages/home';
+
+export default function App() {
+  return (
+    <Routes>
+      <Route path="/" element={<Layout />}>
+        <Route index element={<HomePage />} />
+      </Route>
+    </Routes>
+  );
+}